Sub Tests_B()
Dim i&
Range("L5,L9,L13,L17,L21").Formula = "=INT(ROW()/3)"
Range("L5:L21") = Range("L5:L21").Value
For i = 0 To 4
MsgBox Cells(5 + 4 * i, 1).Resize(4).EntireRow.Address, , "Hidden = 1"
MsgBox Cells(5 + 4 * i, 1).Resize(1 + Cells(5 + 4 * i, "L")).EntireRow.Address, , "Hidden = 0"
Next i
End Sub